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The HEI Standards and Typical Specifications for Tray Type Deaerators (11th Edition), released in 2023, represents the most current and rigorous evolution of deaerator design. This edition reinforces the Heat Exchange Institute's stance that the Tray Type design is the gold standard for industrial and utility power plants, particularly where reliability and high "turn down" (the ability to operate efficiently at low flow) are required.
While the 10th Edition laid the groundwork for modern safety, the 11th Edition further refines the mechanical and chemical engineering requirements to prevent the most common cause of deaerator failure: stress corrosion cracking (SCC).
Key Content & Scope
The 11th Edition is used by engineers to specify a complete deaerator package, ensuring it meets strict safety and performance benchmarks:
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